Knees are caving, here's the "why" that is important to correct: Knees Out/Toes Out in the Squat | Mark Rippetoe
Two additional comments; 1) It took you 19-20 seconds to begin your first rep after removing the weight from the rack; way to long. 2) Lifting shoes?
I assume you mean "verified user?" Good idea, make sure to read the sticky on posting videos.